Slubbing device for spinning frames



Maly 21', 1.946. J. R. TENNANT SLUBBI-NG DEVICE FOR SPINNING FRAMES Filed July l0, 1944 INVENTOR.`

Patented May 21, 1946 UNITED STATES PATENT FFICE SLUBBING DEVICE Fon SPINNING FRAMES James R. Tennant, Dallas, Tex. y

Application July 1o, 1944, serial No. 544,264

(ol. er1- 38) 2 Claims.

This invention relates to spinning frames and it has iparticular reference to slubbing attachments therefor.

The principal object of the invention is to provide a slubbing device of simple and economical construction which will produce a smoother and stronger yarn than heretofore possible and further, a liner gauge yarn can be produced by the present invention without the cork-screw effects and irregular diameter of the yarn manufactured through the medium of other and well known slubbing devices.

Another object of the invention is to provide a slubbing device or attachment for spinning frames which is both right and left; has few working parts; is easy to install and operate; requires a minimum amount of attention in operation and is adjustable to take up wear as well as to predetermine the relative spacing of the lumps or slubs produced in the yarn.

With the foregoing objects as paramount, the invention has further reference to certain features of accomplishment which will become apparent as the description proceeds, taken in connection with the accompanying drawing wherein:

Figure 1 is a front elevational View of a slubbing device constructedaccording to the present invention.

Figure 2 is a side view thereof, partly in vertical section.

Figure 3 is a diagrammatic view of a single roving creel, and

Figure 4 shows a swatch of fabric produced from slubbed yarn.

Continuing with a more detailed description of the drawing, reference is primarily made to Figure 2 wherein I0 denotes the prime mover shaft for operating the draft gearing of a spinning frame. On the inner shaft Il is formed a spindle i2 which engages and operates the front roll I3 (see Fig. 3), and which is the only one of the roll assembly affected to produce the results sought by the invention, to become manifest presently.

Mounted on the prime mover shaft I is a pinion I4 whose teeth engage those of a crown gear I5 to drive the same. The pinion I4 has a clutch element I6 affixed thereto or formed integrally thereon, which cooperates with a companion clutch element I'I. The prime mover shaft I9 is provided with an axial bore I8, adapted to receive the reduced end I9 of the inner shaft II so that the shaft Ill may rotate independently of the shaft I I.

Therer are several types of slubbing devices in use, some of which produce the slubbing effect in the yarn by speeding up the rear roll 20"(Fig. 3) It has been found that this practice imposes a tensional stress upon the yarn to such degree that it is not only drawn out and materially weakened thereby, destroying its uniform diameter but also a twist is produced therein which manifests itself in the ultimate fabric product, of necessarily coarser texture, due to these characteristics in slubbing.

The present invention obviates the foregoing objectionable characteristics by intermittently starting and stopping the front roll I3 at predetermined intervals, which imposes no strain on the yarn. During the momentary inactive intervals of the roller I3, a slackening in the normal tension of the yarn is permitted between this roller and the intermediate roller 2 I. W'hen the roller I3 resumes rotation, the slackened length of yarn, in proceeding between the front roller and the companion bottom roller, is formed into a lump or slub which produces the novel effect sought in the filler of the finished fabric.

In order to start and stop the front roller I3 with precision, the sliding clutch element I1 is caused to move into and out of engagement with the companion element I6 which is driven by shaft I0. Preferred among many possible arrangements for so actuating the clutch is a plunger 22, operated by lugs 23 alxed to the face of the crown gear I5 and spaced apart.

To support the plunger 22, an arm or bracket 24 is provided, which is secured at some suitable stationary point on the frame of the machine by means of a bolt 25. Provision is made for adjustment of the position of the arm 25 in the slot 25 through which the bolt 25 passes. A bronze bushing 21 is secured in the head of the arm 24, serving as a bearing for the plunger and in which the latter reciprocates. The inner end of the plunger carries a roller bearing 28, operating on a pivot shaft 29 and against which the lugs 23 engage as the crown gear l5 rotates.

Obviously, as the lugs strike the roller 28 on the plunger, the latter is constrained to yield longitudinally, and in so doing, causes the sliding clutch element I 'I to retract from the companion element I6 with which it is engaged. This action is brought about through the yoke 30, reposing in an annular groove 3l about the clutch element I1, and provided with a split collar 32 by which it is secured, by means of a screw 33, to the plunger 21. t

Resisting movement of the clutch element l1,

betvveen'the clutch element l1 and a shoulder 35 on the shaft Il.

,Should'any fatigue occur in the spring 34 after a long period of operation, the arm 24 may be moved on its mounting to Vimpose greater tension thereon from time to time with little effort. Moreover a change in the number and spacing of the Vlugs on the Acrown gear will be `effective to change vthe starting and stopping intervals of the roller I3 and the effects thereof Will be reflected in the finished product.

The device shown is adapted for operation on the left side of a spinning Vframe and the same device, equipped to function on the right side Vof such machine would differ only to the-extent that the pitch of the clutch teeth Ywould be reversed v v and the arm 24 would be on the side of the shaft I l from that shown.

It is believed that the foregoing includes sufcient reference to the mode of operation lof the invention and the result as'to render a separate description of operation unnecessary.

Manifestly, the construction as shown and described is capable ef some modification and such modification as may be construed to fall Within the scope and meaning of Vthe appended claims is also considered to be Within the spirit and intent of the invention.

What is claimedis: Y

1. In a yarn slubbing attachment for a spinning frame, the combination comprising Va prime mover shaft, roll assembly and draft gear, a Vpinion on said shaft engaging said draft gear and carrying a clutch element, anarcuate arm ad- Yjustably mounted adjacent to and overreaching said shaft, a companion clutch element reciprocably mounted on 'said shaft, a compression spring normally holding said latter clutch element in engagement with said rst clutch element, a plunger supported by said arm at right angles to said draft gear, a fork carried by saidV plunger for actuating said reciprocable clutch element against the resistance of said spring, a

roller on an end of said plunger and means car'- Y operating the roll assembly of said frame, a pinion on said shaft, a draft gear driven by said pinion, a clutch element aflixed to said pinion, a companion clutch element on said shaft, a `spring urging said companion element into engagement with said rst clutch element, a plunger parallel with said prime mover shaft, a fork carried thereby and engaging said companion clutch element,

a roller on the inner end of said plunger and Y means vadjustably mounted onsaid draft gear,

periodically engaging and reciprocating saidV plunger to correspondingly actuate said companion clutch element to periodically suspend rotation of one rollrof said roll assembly.

JAMES R. TENNANT.k 

